I was driving at approximately 20-25 mph when both side curtain airbags deployed. There was no collision or sudden stops. There were no warning lights or symptoms before or after the incident. My battery had been replaced at a local shop 4-5 hours prior to the incident. My child was in the car in her car seat and appears to have no apparent issues following the event. The hearing in my left ear is deteriorated and I have a ringing sound and it makes a distortion sound when the noise levels reach a certain level.